Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Recovery of native fish in Zealandia

Recovery of native fish in Zealandia

February 28, 2013

Another step on the way to restoring Wellington’s Zealandia, as closely as possible, to its pre-human state has been achieved with the eradication of introduced fish from its upper waterways.

“We’ve had great success in controlling pest mammals but this operation to restore our freshwater ecosystem had been on our wish-list for many years so we’re delighted with the results” says Zealandia’s Conservation Manager, Raewyn Empson.

The operation, begun in 2011 in collaboration with DOC, was designed to see if using a naturally-occurring chemical, called rotenone, in flowing water would completely remove introduced trout and improve native freshwater fauna populations.

“A spectacular recovery of native freshwater fauna and continued absence of trout is strong evidence that trout have been eradicated from the upper Karori reservoir and streams” says David Moss from the Department of Conservation (DOC).

“Before the operation there were a few big banded native kōkopu, very few whitebait and hundreds of trout in the streams,” said Mr Moss. Results from fish sampling since the operation in February 2011 confirm trout have been eradicated, and show a dramatic increase in the number of whitebait and now juvenile banded kōkopu and kōura (freshwater crayfish).

With the confirmed absence of trout, Zealandia can now plan to introduce other native fish species into the safer reservoir and streams.

“This breakthrough means we can now start planning to enhance the recovery of the upper reservoir and its tributaries by transfers of other native fish - such as the threatened giant kōkopu” says Empson.

Further information:

-The fish toxin rotenone has been used in New Zealand for a number of years to remove pest fish from lakes and ponds. Eradication of introduced fish from streams is a “first” for New Zealand.

- Brown trout were introduced into New Zealand in 1867 as a sports fish. They compete with adult banded kōkopu and eat the juvenile stage whitebait, as well as invertebrates like kōura.

ENDS

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell: On The Farcical Elevation Of David Seymour

With the election won, it’s time to find jobs for the boy. David Seymour is the Act Party’s latest scrounger to be rewarded by the National Party, and not only with a seat in Parliament. This time around, a couple of parliamentary Undersecretary posts in education and regulatory reform have been thrown in, plus an annual salary of $175,000 while he learns the ropes. Shouldn’t Seymour at least be put on a 90 day trial before he gets his hands on that sort of serious moolah?

It would be for his own good, really. At this rate, Act is never going to learn how to make its own way in the world More>>

 

As Key Mulls Joining ISIS Fighting: McCully Speech To UN Backs Security Council Bid

It is an honour to address you today on behalf of the Prime Minister and Government of New Zealand. Our General Election took place last week - our Prime Minister Rt Hon John Key is engaged in forming a government and that is why he is unable to be here in New York... More>>

ALSO:

Labour: Cunliffe Triggers Party Wide Leadership Contest

David Cunliffe has resigned as Labour Leader, but says he will seek re-election... If there is any contest the election will have to go through a process involving the party membership and union affiliates. More>>

ALSO:

Flyover Appeal: Progress And Certainty, Or Confusion And More Delays?

Lindsay Shelton: The Transport Agency, embarrassed by the rejection of its flyover alongside the Basin Reserve, says it’s appealing because the decision could “constrain progress.” Yet for most clear-sighted Wellingtonians a 300-metre-long concrete structure above Kent and Cambridge Terraces would in no way be seen as progress… More>>

ALSO:

Gordon Campbell: On Cunliffe’s Last Stand

Right now, embattled Labour leader David Cunliffe has three options. None of them are particularly attractive for him personally, or for the Labour Party... More>>

ALSO:

Key Seeking 'New Ideas': Look To Children’s Commissioner On Poverty - Greens

John Key should not reinvent the wheel when it comes to ideas for tackling child poverty, and instead look to the recommendations of the Children’s Commissioner’s Expert Group on Child Poverty, Green Party co-leader Metiria Turei says. More>>

ALSO:

'Safe To Re-Enter' - OIA Docs: Safety Is Absolute Priority At Pike River Mine

“We understand that the time it is taking to complete our evaluation of the risks is frustrating for the family members and we are trying to complete this work as quickly as we can,” Ms Dunphy says. “It is Solid Energy’s responsibility to make this decision and we will do so, once we have all the information required to make a fully-informed decision.” More>>

ALSO:

Images & Report: Mihi To Welcome Newly-Elected MPs To Parliament

The 29 newly elected MPs were welcomed into Parliament with a Mihi. Parliament’s current Speaker David Carter offered advice from his experience working in Parliament advising the MPs to work collaboratively. More>>

Gordon Campbell: On Labour’s Very Bad Year

While Labour leader David Cunliffe still appears to be in denial about the extent of Saturday night’s debacle, there was hardly a single redeeming feature about the election results for the centre-left... More>>

ALSO:

General Election NZ: National Win

Election Night: With almost all votes counted National and John Key have won a third term and are close to being able to govern alone if they so choose. Key has indicated he will still reach out to form a Government with ACT, United Future and Maori Party. More>>

ALSO:

Perfectly-Timed Anniversaries: Suffrage Day Is Last Chance To Enrol

“The last chance to enrol is Friday 19 September. You can’t enrol on election day.” More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
More RSS  RSS
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news